Thank you for your suggestion of using 2D model for the simulation. I have reduced the geometry size in 3D but still using the 2D simulation would be useful to reduce the computing cost. I have the model in 3D (archive here and geometry only here) is it possible to reduce it to 2D model without starting to make the 2D geometry in the design modeler from zero? I searched for the possibilities and tried using the Surface from sketches but it did not work in my case as I have two different sketches (one for rod and another for block). I must be missing something to convert to the 2D model.